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(No Model.) 2 Sheets-Sheet 1.v

J. TRIPP.

SEWING MACHINE. N0. 304%6. Patented Aug. 26, 1884.. Q I V (No Model.) 2 Sheets-Sheet 2.

J. TRIPP.

SEWING 4440141413. No. 304,046. Patented Aug. 26, 1884.

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' 1 1366. [z BQ'Q WITNESSES: INVENTOR M fi 7 BY %W4 ATTORNEY S N. PETERS. Pnnmum n mr. wnnin lon. n. c.

UNlTED Srn'rns Parent @rrrcrr.

JAMES Tmrr, or SEW YORK, N. Y.

SEWING-MACHINE.

SFBCIFICATION forming part of Letters Patent No. 30%,O i6, dated August 26,1884.

Application filed August 7, 1583,

- To all whom it viz/(y concern:

Be it known that I, Janus TRIPP, a citizen of the United States, residing in the city, county, and State of New York, have invented certain new and useful Improvements in Sewing-Machines, of which the following is a specification.

My invention relates to improvements in that part of sewingauachines which is commonly known as the take-up, and the object or my invention is to automatically regulate the take up of the thread to accord with the varying thicknesses of material to be sewed from time to time, and also to allow for sewing seams, laps, and other arrangements of material where an irregular and sudden increase or diminution of the thickness or number of layers of material to be sewed necessitates a variation in the amount of take up, in order to produce perfect work.

In carrying out my invention I mount upon the presscr-footshaft, by preference within the head, a short arm capable of vertical adjustmentand secured in position by a'set screw, pin, or other equivalent means. To the outer end of this short arm is pivoted a vertical arm, to the upper end of which is connected a pin or itriction-roller adapted to be received and work within a slot formed in a pivoted lever, on the upper end of which is formed or connected the take-up portion or arm. On the rear of the vertical arm I form or affix a pin or friction-roller adapted to engage with a cam course or surface, by preference formed on or at'fixed to the front face of the needle-bar. The cam course or surface I prefer to form in a plate of metal bolted to the needle-bar-with capability of vertical ad'- justme-nt.

The accompanying drawings form part of this specification, and illustrate what I consider the best means of carrying out my invention. 7

Figure 1 is a detached view of the head of a sewing-machine with my improvements ap plied thereto. 2 is a similar View with the needle-bar removed. Fig. 3 is a vertical section on the line a: w of Figs. 1 and 2. Fig. 4 is a plan. Fig. 5 is a back View of part of the needle-bar with its cam-plate. Figs. 6, 7, 8, and 9 are detail views of parts.

(No model.)

In each of the views similarletters of reference are employed to indicate corresponding parts wherever they occur.

A represents the machine-head.

B is the prcsser-foot, and B is the presserfoot shaft, upon which is mounted or secured by means of a set-screw, Z), a short arm, G, enpable of vertical adjustment.

To the outer end of the short arm G is pivoted a vertical arm, D, to the upper end of which is connected apin or frictiorrroller, D, adapted to be reccivedand work wit-hinaslot, 0, formed in-a pivoted lever, E, on the upper end of which is formed or connected the takeup portion or arm P.

On the rear of the vcrti cal arm I), I form or afiix apin or friction-roller, (1, adapted to engage with a cam course or surface, f, whichin the drawings is shown formed in a plate, F, connected to the needle-bar F by means of belts or screws f. The belts or screws 7 pass through slots f formed in eyes or extensions f forming part of the side of the plate F. The slots f I prefer to elongate in form, so as to allow of the adjustment of the plate F.

The pivoted lever E, I prefer to form with an extension or arm, E to the end of which is applied a coiled or other suitable spring, E",

and the roller (1 in constant connection.

It will be evident that by the peculiar construction of the parts either the cam-course or surface f can be adjusted in relation to the pin or roller D or the position of the short arm Q on the presser-foot shaft 13' can be changed, or both parts can be adjusted in relation to each other, so as to produce any desired variation in the takeup.

Having thus described my invention,what I claim, and desire to secure by Letters Patent, 1s

1. In a take-up mechanism for sewing-machines, the combination of a lever adjustably mounted on the presscr-foot shaft, acam-piece adjustably mounted on the needlebar, and a spring-lever and take-up extension, all being constructed and adapted to operate substantially as shown and described.

2. In a take-up mechanism for sewing-machines, the combination, with the presser-foot shaft and needle-bar, of the adjustable camadapted to keep the cam course or suri'acef so piece F, means for adjusting the same, a piv- I 0, formed in the lever E, all being in eombina- 2o oted lever, D, as described, spring-lever E, and means for connecting the said lever D with cam-piece F and spring-lever E, substantially as and for the purpose set forth.

3. The combination, with the presser-l'eot shaft and needlebar of asewing-maehine, of a cam-piece mounted on. the needle-bar, a pivoted lever mounted on the prcsser-foot shaft, having a driving-pin formed on its upper end, pin or friction-roller d, a pivoted takeup lever having a course formed in its upper end, and a spring, all being constructed and adapted to operate substantially as shown and described.

4. The pivoted bent lever D, formed with a pin or projection, (1, adapted to engage with a cam-piece, F, and provided with an anti-friction device, I), adapted to work in the course 1 tion with said cam-piece F, lever E, and the presser-foot shaft and needlebar of a sewingmachine, substantially as and for the purpose set forth.

5. In combination with the take-up mechanism of a sewingniachine, the cam-piece 'F, and j ustabl e on the needle-bar F by means of screws f, and slotsf", formed in the plate F, all being constructed as described, and adapted to operate substantially as and for the purpose et forth.

In witness whereof I have hereunto set my hand this 12th day of June, 1883.

JAMES TRIPP.

Vitnesses:

\V. OOLBORNE BnooKEs, GABRIEL J. \V. GALSTER. 

